Krygen XL Due to the reduction of calorie intake during the early periods of using any weight loss product and in particular those especially designed to supposedly facilitate quick fat reduction the body is forced to release and burn its stored glycogen for energy fuel. Glycogen is essentially made up ofwater andglucose and therefore when glucose is metabolized water is largely produced as a byproduct. Consequently aboutof the weight lost during this initial rapid bodyweight reduction is mostly from lean body mass muscle and water andfrom unwanted body fat.